$(function () {
    $(".date_num").html(dateShow());
})
//获取当前的时间
function dateShow() {
    var mydate = new Date();
    var str = "";
    str += mydate.getFullYear() + "/";
    str += (mydate.getMonth() + 1) + "/";
    str += "<span class='date_span'>" + mydate.getDate() + "</sapn>";
    return str;
}